Yale 11353395D manual Section Vi - Trouble Shooting, To Avoid Injury, Probable Cause, Remedy

SECTION VI – TROUBLE SHOOTING

6-1.GENERAL.This section contains possible causes and solutions to common hoist problems. Please attempt to remedy your hoist problems by following these steps before contacting the factory.

Whenever servicing electrical components be sure to shut off and lock out power following proper lockout/tagout procedures.

WARNING

Working in or near exposed energized electrical equipment presents the danger of electric shock.

TO AVOID INJURY:

DISCONNECT POWER AND IMPLEMENT LOCKOUT/TAGOUT PROCEDURE BEFORE REMOVING COVER OR SERVICING THIS EQUIPMENT.

SECTION VI – TROUBLE SHOOTING

TROUBLE	PROBABLE CAUSE			REMEDY
6-1 Hoist Will Not	a.No power to hoist.			a.Check switches, circuit breakers or fuses and
Operate.				connections in power supply lines. Check power
				collectors.
	b.Wrong Voltage.			b. Check voltage required on motor data plate
				against power supply.
	c. Loose or broken wire			c. Shut off and lock out power supply; remove
	connections in hoist electrical			electrical cover on hoist and check wiring
	system.			connections. Also check connections in push
				button station and limit switches.
	d.Contactor	assembly	not	d.See that necessary jumper wires are properly
	functioning.			installed. Verify that the contactor armatures are
				free to move. If binding occurs, replace
				contactor. Check for burned out contactor coils.
	e.No control voltage.			e.Check transformer fuse. If blown, check for
				grounding and/or shorts in the push button
				station. Check the transformer coil for signs of
				overheating. Replace transformer if burned out.
				Verify the transformer secondary is the same
				voltage as the coils to which it is connected.
	f. Motor burned out.			f. Replace motor. Check input power supply.
				Check hoist motor connections.
6-2 Hook Moves in	a.Reverse phasing on three-			a.Interchange any two power supply line leads.
Wrong Direction.	phase hoists.			Refer to Section II, Paragraph 4.b.
	b.Hoist wired incorrectly.			b.Check wiring connections with appropriate
				wiring diagram.
6-3 Hook Will Raise	a.Lower electrical circuit open.			a.Check for loose connections. See that necessary
But Not Lower.				jumper wires are properly installed on contactor.
	b.Contactor	assembly	not	b.See that necessary jumper wires are properly
	functioning			installed. Verify that the contactor armatures are
				free to move. If binding occurs, replace contactor.
				Check for burned out contactor coils.
	c. Down, push button is			c. Check push button contacts and wires.
	inoperative.

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